Why Octopus Has 3 Hearts
By: EjazUlHaqBhat
Image: Pexels
Octopuses have three hearts, which is partly a consequence of having blue blood
Image: Pexels
Their two peripheral hearts pump blood through the gills, where it picks up oxygen
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A central heart then circulates the oxygenated blood to the rest of the body to provide energy for organs and muscles
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Two peripheral hearts that pump blood to the gills to pick up oxygen are called branchial hearts
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The central heart that pumps oxygenated blood to the rest of the body is called systemic heart
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Octopuses have blue blood because of the copper-based protein hemocyanin, which carries oxygen in their blood
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Hemocyanin is more efficient in transporting oxygen in colder temperatures, but less efficient than hemoglobin at normal temperatures
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When they swim, their systemic heart stops beating, which causes them to tire quickly. This is why octopuses prefer to crawl over swimming
Image: Pexels
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